Home / 725,688.40-1,087,220.40-620,712.40

Finding the Fourth Proportional to 725,688.40, 1,087,220.40 and 620,712.40

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Solution

The fourth proportional to 725,688.40, 1,087,220.40 and 620,712.40 is: 929,946.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,688.40 : 1,087,220.40 = 620,712.40 : x
  2. Step 2: Convert to fraction form
    725,688.40/1,087,220.40 = 620,712.40/x
  3. Step 3: Cross multiply
    725,688.40x = 1,087,220.40 × 620,712.40
  4. Step 4: Simplify right side
    725,688.40x = 674,851,183,812.96
  5. Step 5: Solve for x
    x = 674,851,183,812.96/725,688.40
  6. Step 6: Final answer
    x = 929,946.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.